package BinaryTree;

import java.util.ArrayList;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 姚东名
 * Date: 2024-09-17
 * Time: 21:26
 */
public class Test1 {
    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(0, 10);
        list.add(0, 20);
        list.add(0, 30);
        list.add(0, 40);

        System.out.println(list);
    }
}
